19820073 has 32 divisors (see below), whose sum is σ = 32972800. Its totient is φ = 10310976.

The previous prime is 19820069. The next prime is 19820077. The reversal of 19820073 is 37002891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19820069) and next prime (19820077).

It is not a de Polignac number, because 19820073 - 2² = 19820069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19820073.

It is not an unprimeable number, because it can be changed into a prime (19820077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21108 + ... + 22026.

It is an arithmetic number, because the mean of its divisors is an integer number (1030400).

Almost surely, 2^19820073 is an apocalyptic number.

19820073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19820073 is a deficient number, since it is larger than the sum of its proper divisors (13152727).

19820073 is a wasteful number, since it uses less digits than its factorization.

19820073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 19820073 is about 4451.9740565282. The cubic root of 19820073 is about 270.6253133602.

The spelling of 19820073 in words is "nineteen million, eight hundred twenty thousand, seventy-three".